I'm kinda new to the Kitfox line and have some questions. Does the Mod IV support the 80 and 100 hp 912's. Any problem with me buying a Mod. IV say with a 582 or whatever and putting a 912 on. I'm concerned about the W&B or how is this compensated for? I now have a Kolb Firestar that I built and love the little plane, but the wife wants to go. Any suggestion would be nice.